Laqueuer, Walter
Penguin Books, 1972
Buku Teks
Laqueur, Walter
N.Y Penguin, 1982
Buku Teks
Hall, Walter Phelps
Appleton-Century-Crofts, 1957
Buku Teks
Thomson, David, author
Longmans, 1962, 1973
Buku Teks
Thody, Philip, author
Routledge, 2000
Buku Teks